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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A263430 a(n) = Product_{k=0..n} (4*k+1)^(n-k).

Table of values

n a(n)
0 1
1 1
2 5
3 225
4 131625
5 1309010625
6 273380323978125
7 1427352844030287890625
8 216119240915841469025244140625
9 1079864992142473709995957417730712890625
10 199639840782299404795675492100337942688751220703125

List of values

[1, 1, 5, 225, 131625, 1309010625, 273380323978125, 1427352844030287890625, 216119240915841469025244140625, 1079864992142473709995957417730712890625, 199639840782299404795675492100337942688751220703125]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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